I really like this idea because it is a simple and easy way for people to reduce food waste.  It might take more time for the grocery store to research the best storage options but it will not cost extra for the buyer or the store.  I think people will definitely take the advice of the best way to store there food because I can imagine the majority of people will not go out of there way to research each item in their kitchen and how to store it best.  One question I have is how do you plan to design the sign in order to make people want to read it.  Many people when they go shopping are usually just grabbing everything fast.  I do think your idea of having the food facts next to the price is a very smart idea because people are very concerned with price and maybe while they are looking at the price a word in those facts will catch their attention.  I also like Michelle Leung's comment where people should have take home labels because with all our busy lives we have so much going on and probably by the time we get home we might forget the facts.  I would imagine many people might take a photo with their phones to solve this issue of forgetting but not all of us want that take up our photo storage and then having to search for the photo later on.  Maybe this sticker idea could turn universal to all stores where someone creates an app and the stickers could be scanned so when the people get home they just need to scan the label and it could tell them all the needed fruit facts versus using paper pamphlets that are wasteful and easily lost.